After have downloaded the jar
file, create a directory and extract all files using the jar tool, let's say you
create a direcoty under windows named C:\JBeanGen , then a command line
write:

jar xvf
JBeanGen

This command will extract all
classes and source code to generate Beans,so go to your prefered Java Editor or
IDE and modify the class Conexion under database package to adjust to the JDBC
driver of your selection.

Then you can modify JBeanGen.bat
(make a JBeanGen.sh for Linux or other Unix System), to put the JAVA_HOME
enviroment variable to your Java home path and run the resultin JBeanGen.bat or
JBeanGen.sh

Optionally you can edit the
classes GeneraBeanVO and GeneraDAOClasses to look for tables with a determinated
prefix on a database, just change the % for the prefix you want for example
MyPrefix% will filter tables to geenerate code just for talbes named
MyPrefixTable1, MyPrefixTable2 and so on.